Differential



Patented Aug. e, 1932 u l19719952 i .UNirEn e .Tosnrn GUILMETTE.onsnrnmcrnlvi QUEBEC, CANADA i ..ninnatnirJJIAL`y Y l, Appneation V1aed, october e,V ieao. 'sealara 487,424. f

The present invention pertains to a novel by use of like characters which are employed differential designedparticularly for motor to designate corresponding parts throughout. vehicles, although equally luseful in other The mechanism is enclosed mainlyfin a machines where V.two alined shafts or axles housing 1 to'which is secured the rear end of 5 are to be driven.` a drive'shafttube2 by meansof bolts 3i be y The principal object of the invention is to drive or propeller shaft 4e passes through the providev greater vfreedom of the shafts, 01' tube 2 and carries a pinion` 5 disposed within Wheels carried thereby; Yfrom each other, thehousingl..` y thereby reducing the amount of spinning of Axle shafts 6 are journalled in roller bear Y theshaft having less load and also reducing ings Z inthe housing 1. These shafts are in 6U the wear of tires carried by the wheels. mutual alinement and perpendicular to the Another Objectis to provide a direct and drive shaft 1in order to carry the driving invariable drive connection from the power wheels of a motor vehicle in the usual manshaft to the axles, whereby v an lequal and ner. n l i positive drive'is applied to each shaft when i The inner ends of the shafts 6 are toothed *35 the load is heavy, asin running over snow, at 8j for driving engagement with friction ice, sand7 -rough ground and soft earth. disks 9 formed with sleeves 10 also internally These objects are accomplished by the use toothed for locking engagement with the of a slip or frictional connection between toothed portionsS.V Between the .disks 9 is '20 thema-inV gear and the axles. lhe` dierinserted a driving 'frictiony disk 11 formed ential action for diiferent loads on the axles with anannular or crowngear 12 normally is acquired vthrough a slip in the frictional in .mesh with the drive pinion 5. A connections. For aeheavy load on each aXle, The outer faces of the'dislrs 9 are engaged a gear shift is provided for connecting the by friction rings 13 formed .with internal 29 axles directly and positively to the main gear. teeth 111'. Headed'bolts`15 pass through the 75 The invention is fully disclosed by way of members i 11 and 13 and' are (surrounded at example in the following description and in one end by compressed springs 16V whereby the accompanying drawings in which these parts are frictionally held together. Figure lis a plan section of the dieren- The 'members' 9 are free to rotate within a 30 tial; v Y Y l flange 17 on the platell andare driven from su,

` Figure 2 is a section on the line 2 2 of Vthe plate 11 by frictional Contact therewith. Figure1; e f In order to provide a positive drive bef `*Figure 3 is an enlarged detail view ofthe tween the members 12 andshafts 6, sliding roller mounting;` pinions 18 are splinedlorkeyed at 19 on the Figure 1 is a detail section .of the roller sleeves 10 and adapted toemesh with teeth 14. w mounting; at right angle to Figure 3. e The'V gears A18 are provided with shifter Figure 5 is a section on the line 5 5 of `half collars 2() from which stems 21 extend f Figure 3; y through the housing 1. Levers 22 a'repiv- .Figure 6 is a section on the line 6 6 of oted to thefstems and also to the housing 1 i Figure 1; I at Operating rods '24textend Afrom the'um Figure 7 is a section parallel to the plane .levers 22 and are yfinally attached to operatof Figure 1, partly in ele'vationand in disenlevers 25v mounted within` 'convenient gaged positron; reach of the driver. The levers have their Figure 8 1s a section on the` line 8 8 of handles 26 Vpositioned close .together but F 1f^l1 1' 7; Y K, Y slightly spaced so that eitherone or both may l Figure 9 isa section on the line 9 9 of Fig# be gripped with onev hanrhas desired. ure '7 also showing the operating levers; and. .AT conical roller 27 is iourn alledin a notch Figure 10 is a section on the line 10 10 of 28 cut in the/*housing 1 as shown more clearly FLQTUIG 9 A y. f 'in Figures V3 and 4.: roller-serves as aV Reference to these views will now be made rester bearing for the crown gear 12.r vBoth ends of the roller are carried in bearings29 adjustable with reference to the notch 28 by means of set screws 8O engaging the housing as may be seen in Figures l, 3 and 5. Y

The free ends of the axle shafts 6 are also suitably journalled as shown in Figure 7.

These ends ride onball bearings 3l and roller l bearings 32E held by' a retaining sleeare 3.3

threaded into the housing l at 34. The

sleeve is further secured by a set sc rew 35.

The inner endl oitthe. driweshaiitis accommodated in roller bearings'l 37whi'chin turn are housed in a lcage 88. The

gear'12.. Whenit is. desi-redtofdi'sengagethe members and.; 112,. the wedge is. ,withdrawn after removal of its retaining screw 41,. and

the.y eager is moved horizontally' by adjustmentl of theset screw 42engaging: it..

It will now bel evident that the drive. to the axles is normally.v transmitted. through frictional. connections. whereby beth axles turn at equal speeds. When one ofthe axles carries a greater lfoadfthan` the otherT asin rounding. a; curve, the. differenti al movement is: takenufp. by a slip the` frictional connections.. lSl'ever-thelessr bothV axlesy turn. at` `all times so that complete idleness of. one. of the axles,. asin other diii'erentialszunderrcertain conditions, is. avoided. This. property of invention results. 3in1 eqnal powerin. the axles when. travelling over soit ground,- reduction of. the. dan-ger of breaking the. axles: and gears. byk sudden shocks-at thev wheels, .and rednctionoV wearv onlthe tires; VRepair, and replacement ofthed'iiiterentialparts are also acilitatedtthe` load on. the axles isxunusually heavyT a. direct drive is obtainable by engaging the. pinions. 18 with the gearsl 14. which in. turnare positively securedv to the main gear 12 by the. bolts 15k 'lhisdirect4 driveis nl particularly useful in` travelling over hills,

rough grou-nd,. carry-ing a heavy load, and

in. other cases` where the strailn on the axles isheavy'..

Although a specific embodiment ot the invention has vbeen illustrated and described, it. will be understood that' various alterations in the details of construction-may `be made without departing fromy the scope of.

the inventionv asind-icated bythe. appended What'lclaimiszel. A differential `comprising;a`maingear havinga frictional portion, axlesratfopposite sides of said portion, frictienalf drivingmembers carried by saidv axlesand engagingrsaid. f

portion,l and s pringmeans holding. said memhaving a. frictional portion, axles at opposite sides of, saidk portion, trictional 'i driving members carried by said axles and engaging saidfportion, auxiliary gears mounted on said'members, bo1tspassedI through said gears and rictional portion, springs on said bolltstending to clamp said gears, driving members and frictional portion together, pinions splinedwitl'r respect to said axles, and. means forY moving; said pinions intox and out of engagement-withsaid `auxiliary gears. differential comprisingamain. gear having a. frictional portion, axles at. opposite sides kof saidi portion, frictional. driving members carried by saidaxl'es and: engaging' said portiomauxiliary' gears mounted: on. said members', bolts passed. through said. gears and. frictional portion springs on saidi bolts tending. to clamp sai gears,` driving mem.-

lbers and frictional portion togetherTpinions splined. on said" auxiliary. gears and. means for moving. said pinions.. into and ont oengagement. with .said auxiliary gears..

' 4... A--diilerentiall comprising. a; main: gear having. airictional portion,f axles. at oppesite sides. of! said portion, frictional driving members. carriedA by said axles and. engaging members. in engagement withsaid portionfa drive shaft havingl ai pinion meshing: with said main. gear, a housing. enclosing said shait, a. bearing cage slidably fittedin said housing and. accommodating said shaft,vv and a. removable keyholding said' cage against movement and said shaft operative position' relatively toE said; gear..

5. A differential comprising a housing, a pair of. spaced.' Vand. alinedf. axles journalled therein, trictional members carried axles, a main gear having a frictional portion disposed between said members, iary-V gears mounted on saidvfrictional'fmembers, bolts passed' through. said, auxiliary gearsY and `rictional-members-7 springson said' boltsV and clampingsai'd lgears and-mem- `bers against said frictional portion', pinions ksaid. portion, and. spring. means vholding said therein, Jirictional members carried by said axles, a main vgear having a rictional por- W tion disposed between said members, AauxiliiaryY gears mounted on said :trictionalA members, bolts passed through` said auxiliary 'gears and rictional. members, springs' on saidV bolts and clamping said vgears andmembers againstsaid frictionalportion, pinions splined wit-h respect to said axles, shifting K collars rotatably mounted on said pnions,

and linkage extending from said collars for moving said pinions into and out of engagement with said auxiliary gears.

`In Witness Where0f5 I have hereunto Set my hand. Y

Y JOSEPH GULMETTE. 

